Hi,
Manual GD3 Jazz 1.5

When the AC is on I get a slight stutter from the engine, like a momentary hesitation and it happens at slower speeds, whilst the AC is on. cruises at higher speeds with no hesitation..
If I turn the AC off, the car runs perfectly, I have noticed this also happens more if I have four people in the car so indicates when the engine is under load

I have replaced>
New Coil Pack (twice) just in case I had a faulty coil.
Plugs NGK
EGR (new)
Air filter
Oil and Filter
Injector cleaner in fuel

Could it be a dirty throttle body or a worn serpentine belt
or stuffed AC compressor
or Battery
Stuffed injector?

Any ideas..anyone

 

Try doing the idle learn procedure with the a/c and fan on max.

 

I will try that, I have ordered some more coils

 

Changed plugs, changed coils , throttle body clean and new air filter . Ran better for about 2months now problems started again but worst misfired like crazzy . I'm pretty sure I narrowed down to 2 bad fuel injectors . If I was u do it now before it's 2 late. Check ur injectors before they ruin ur computer so I been reading on these forums . You can squeeze ur hand through pull the harnes plugs from injectors . This is without pulling car apart And test ur injectors with an ohm meter. They should read 10-13 ohms and less there's a problem with injector . Then check the wire Harness plugs I'm still working in this part exactly what it all means there's forums but it's not to clear. But they will help you oh I got a 2008 200k 1.5